Factual error: When Billy The Kid is taking a bath and dictating a letter to Doc, intended for the governor, he says he is in the Mexican village of Juarez. This town was actually named "Paso del Norte" at the time, it wasn't until 10 years after the events depicted in the film that it was renamed "Ciudad Juarez."

When the Regulators are making their escape out of the house at the end, if you look at the extra shot right after Charlie (Casey Sizemore) busts out of the house, you'll see a young Tom Cruise. He was on-set visiting with friend Emilio Estevez and got into makeup (including huge sideburns) and on-screen.